Focal length: 4.5mm
Maximum aperture: 2.8
Minimum Aperture: 22
Lens Construction: 13 Elements in 9 Groups
Angle of View: 180 degrees
Number of Diaphragm Blades: 6 Blades
Minimum Focusing Distance: 13.5cm/5.3 in.
Maximum Magnification: 1:6
Filter: Insertion-type gelatin filter into rear of the lens
Dimensions (D x L): 76.2mm x 77.8mm (3.0 in. x 3.1 in.)
Weight: 470g (16.6 oz.)